Well this is difficult to answer. In theory yes but here are some restrictions:
1. If you want autofocus it will work only or mostly with sigma lenses that are compatible with this. You can find these here https://www.sigmaphoto.com/lenses....
2. If you work with manual focus then it works great with all canon EF mount lenses. Some will also have some autofocus but this is not usable. Will not work with Tamron. I use the 50mm 1.4 with A7 and the images are amazing. I also have full aperture control. This is much better quality than the sony 50mm 1.8 FE which by the way is really a waste of money. Actually the kit lens is fantastic comparted to it.
3. I use it mostly with my a6300 where autofocus actually works very well with all my canon lenses as well as my tamron 17-50 VC and the 70-300 VC. I assume that if you get the A7Rii which has the same focusing system with the a6300 it should again work well.
Bottom line its generally a good product but it depends on the camera that you are using as well as the lenses that you prefer.
Hope that this helps.
Theodore